CAJ | 학술논문

耐压结构在使用前一般都要进行内压试验，经过内压试验后结构的焊接残余应力会发生改变。残余应力的变化会对结构的力学特性有一定影响。文章首先运用ANSYS的APDL语言编写了大尺度锥柱耐压壳模型焊接残余应力数值模拟程序，对耐压结构的初始残余应力和经过内压试验后残余应力的变化进行计算；然后，采用X射线无损检测方法对该大尺度锥柱耐压壳模型的初始残余应力和经过内压试验后的残余应力进行测量。计算结果与试验结果表明，随着内压增加，内壳残余拉应力不断降低；而外壳残余压应力则变化不大；并且数值模拟结果与试验结果基本吻合。该文研究结果为更加合理可靠地进行耐压结构力学特性分析提供了理论依据。
내압결구재사용전일반도요진행내압시험，경과내압시험후결구적한접잔여응력회발생개변。잔여응력적변화회대결구적역학특성유일정영향。문장수선운용ANSYS적APDL어언편사료대척도추주내압각모형한접잔여응력수치모의정서，대내압결구적초시잔여응력화경과내압시험후잔여응력적변화진행계산；연후，채용X사선무손검측방법대해대척도추주내압각모형적초시잔여응력화경과내압시험후적잔여응력진행측량。계산결과여시험결과표명，수착내압증가，내각잔여랍응력불단강저；이외각잔여압응력칙변화불대；병차수치모의결과여시험결과기본문합。해문연구결과위경가합리가고지진행내압결구역학특성분석제공료이론의거。
There is generally internal pressure tests for pressure structure before its service, and the residu-al stresses could be changed after the internal pressure tests. The mechanical property would be affected by the variation of the residual stresses. In this paper, a program of the simulation of the welding residual stress-es for a large scale model of cone-cylinder pressure hull is done with APDL of ANSYS firstly, and the ini-tial residual stresses and the variation of residual stresses after tests are calculated; Then, the initial resid-ual stresses and the residual stresses after the internal pressure tests are measured with X-ray nondestruc-tive detection for the large scale model of cone-cylindrical pressure hull. The results of calculation and the test show that the residual tensile stresses decrease constantly on the internal surface with the increase ofthe internal pressure, and the residual compress stresses change little on outer surface;The numerical sim-ulation results are coincident with the test results. The research provides a more over theoretical basis for the mechanical characteristics analysis of pressure structure.